CN111664089A

CN111664089A - Electronic oil pump

Info

Publication number: CN111664089A
Application number: CN202010453238.5A
Authority: CN
Inventors: 高坤; 罗力元; 王雪皎; 胡林勇; 李通政; 周培良; 罗玉龙
Original assignee: Ningbo Shenglong Automotive Powertrain System Co Ltd
Current assignee: Ningbo Shenglong Automotive Powertrain System Co Ltd
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2020-09-15

Abstract

The invention discloses an electronic oil pump, which comprises a pump body, a pump cover, an inner rotor, an outer rotor, a driving shaft, a motor shell, a motor rotor, a motor stator, a confluence disc and a controller, wherein the inner rotor and the outer rotor are arranged in a cavity of the pump body; the controller is installed on the motor shell, and the controller is connected with the motor stator through a confluence disc; a pump body shaft hole is formed in the pump body, a pump body lubricating oil groove is formed in the pump body shaft hole, and a pump body oil drainage pipeline is arranged at the bottom of the pump body shaft hole; the pump cover is provided with a pump cover shaft hole, a pump cover lubrication groove is arranged in the pump cover shaft hole, and a pump cover oil drainage pipeline is arranged at the bottom of the pump cover shaft hole. The invention has simple and compact structure, low cost, simple and reliable support structure of the driving shaft and excellent lubricating and cooling performance.

Description

Electronic oil pump

Technical Field

The invention relates to the technical field of automobiles, in particular to an electronic oil pump.

Background

The automobile industry develops rapidly, and with the development of automobile performance towards safer, more reliable, more stable, full-automatic intelligent and environment-friendly energy-saving directions, the electronic oil pump is widely applied to automobile lubricating systems and cooling systems and can well meet the market requirements.

The electronic oil pump mainly provides the power supply for the lubricating system and the cooling system of car, and the electronic oil pump is installed on the vehicle, and the electronic oil pump includes the drive shaft, and current electronic oil pump structure is complicated and with higher costs, and how to design the electronic oil pump structure and the simple structure of compact and reliable, the drive shaft bearing structure with low costs of simple structure is the technical problem that awaits the solution urgently.

Current application number is 201710770581.0's patent application file, and it discloses an electronic oil pump, including casing, pump rotor, transmission shaft, motor rotor, stator module and circuit board subassembly, the casing includes first casing, second casing and third casing at least, first casing with form the pump inner chamber between the second casing, the second casing with form the motor inner chamber between the third casing, the pump rotor holding in the pump inner chamber, motor rotor, stator module and circuit board subassembly holding in the motor inner chamber, electronic oil pump includes first supporting part, first supporting part with second casing integrated into one piece, the transmission shaft is direct or indirect first supporting part. The first supporting part and the second shell are integrally formed, and a supporting element is not required to be independently arranged to realize the simple and compact structure, but two bearings are required to be arranged at two ends of a transmission shaft of the motor rotor by adopting the structure, the structure is relatively complex, and the cost of the bearings is high.

Therefore, it is very important to design an electronic oil pump with simple and compact structure, low cost and excellent lubricating and cooling performance.

Disclosure of Invention

In view of the above problems in the prior art, an object of the present invention is to provide an electronic oil pump with simple and compact structure, low cost, simple and reliable support structure for the driving shaft, and excellent lubrication and cooling performance.

The specific technical scheme is as follows:

an electronic oil pump comprises a pump body, a pump cover, an inner rotor, an outer rotor, a driving shaft, a motor shell, a motor rotor, a motor stator, a confluence disc and a controller, wherein the inner rotor and the outer rotor are arranged in a cavity of the pump body; the controller is installed on the motor shell, and the controller is connected with the motor stator through a confluence disc; a pump body shaft hole is formed in the pump body, a pump body lubricating oil groove is formed in the pump body shaft hole, and a pump body oil drainage pipeline is arranged at the bottom of the pump body shaft hole; the pump cover is provided with a pump cover shaft hole, a pump cover lubrication groove is arranged in the pump cover shaft hole, and a pump cover oil drainage pipeline is arranged at the bottom of the pump cover shaft hole.

Compared with the prior art, the oil pump has the advantages that the pump body and the pump cover are respectively provided with the shaft hole, the shaft hole is provided with the lubricating oil groove, the bottom of the shaft hole is respectively provided with the oil drainage pipeline, oil entering the lubricating oil groove can flow into the oil inlet cavity through the oil drainage pipeline after lubricating the driving shaft, and the driving shaft can be effectively lubricated; the motor rotor and the inner rotor are separated by a pump cover and connected by a driving shaft, and the pump cover and the pump body are assembled to form a sealed oil pump cavity. The electronic oil pump adopts a modular design, and the oil inlet cavity and the oil outlet cavity designed on the pump cover are matched with the sizes of the inner rotor and the outer rotor, so that compared with a product in which an oil pump oil cavity is designed on a motor shell or the pump cover is integrated with the motor shell, the electronic oil pump is convenient to replace parts, and can avoid replacing the motor shell with a larger volume structure. The invention has simple structure, low cost and excellent lubricating and cooling performance.

Further, one end of the drive shaft is mounted in a pump body shaft hole of the pump body, forming a first support sliding bearing. And a section of driving shaft between the inner rotor and the motor rotor and the pump cover shaft hole form a second supporting sliding bearing. The support structure of the driving shaft is simple and reliable.

The inner rotor and the outer rotor are meshed with each other, a sealing cavity is formed by the inner rotor, the outer rotor and pump covers of the pump bodies on two sides, and the sealing cavity is divided into an oil inlet cavity and an oil outlet cavity by meshing lines of the inner rotor and the outer rotor. When the motor rotates, the inner rotor is driven to rotate clockwise, the outer rotor is further driven to rotate at the same direction and different speeds, the volume of the oil inlet cavity is gradually increased to form partial vacuum, engine oil and liquid are sucked into the pump cavity, the volume of the oil outlet cavity is gradually reduced, the pressure in the cavity is gradually increased, and the oil and liquid are pressed out of the oil pump, so that the structure is simple and reliable.

The tail end of the pump cover shaft hole is provided with an oil seal hole, the oil seal hole is provided with an oil seal, a sealing effect is achieved, and oil is prevented from entering the motor through the pump cover shaft hole.

Preferably, the outlet of the electronic oil pump is provided with a one-way valve, the one-way valve comprises a steel ball, a spring and a valve seat, the valve seat is matched with the pump body, and the steel ball and the spring are arranged in the valve seat. When the oil pump rotates to discharge oil, the steel ball compression spring can be pushed under the condition that the oil pressure is very small, oil discharge is realized, and when the oil pump stops rotating, the spring can push the steel ball to reset, an outlet is sealed, and oil liquid in the system is prevented from flowing back.

The bottom of the valve seat is provided with a fan-shaped window, and the middle of the valve seat is provided with a positioning boss, so that the spring is prevented from being installed and inclined.

In addition, the electronic oil pump also comprises an oil pump sealing ring, a motor sealing ring and a controller sealing ring, so that a better waterproof effect is achieved, and the normal operation of the oil pump is ensured.

The controller is externally provided with a controller cover, and the controller cover is provided with a waterproof vent valve for preventing liquid such as water from entering and ensuring gas circulation to balance the internal pressure and the external pressure of the electronic oil pump.

The controller is connected with an external system through a wiring harness, when the electronic oil pump works, the external system transmits a control signal to the controller through the wiring harness, the controller controls the motor stator to generate a regularly changing magnetic field through the confluence disc, the motor rotor rotates under the action of an alternating magnetic field and drives the oil pump to rotate through the driving shaft, and then oil is conveyed out, so that the cooling and lubricating functions are realized.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a cross-sectional view of the overall construction of the present invention;

FIG. 3 is a schematic view of the inner and outer rotors of the present invention;

FIG. 4 is a schematic view of the check valve of the present invention;

FIG. 5 is a structural sectional view of the check valve of the present invention;

FIG. 6 is a schematic structural view of a pump lubricating oil groove and a pump oil drain pipeline in the present invention;

FIG. 7 is a cross-sectional view of FIG. 6;

FIG. 8 is a schematic structural view of a pump cover lubrication groove and a pump cover oil drainage pipeline in the present invention;

FIG. 9 is a cross-sectional view of FIG. 8;

fig. 10 is a schematic view of the construction of the first and second support slide bearings of the present invention.

In the attached drawings, 1 is a pump body; 1.1, pump cavity; 1.2, oil inlet cavity; 1.3, an oil outlet cavity; 1.4, a pump body shaft hole; 1.5, a lubricating oil groove of the pump body; 1.6, a pump body oil drainage pipeline; 1.7, oil pump screws; 1.8, a positioning sleeve; 2. a pump cover; 2.1, pump cover shaft hole; 2.2, sealing oil holes; 2.3, oil sealing; 2.4, lubricating oil grooves of the pump cover; 2.5, a pump cover oil drainage pipeline; 3. an inner rotor; 4. an outer rotor; 5. a drive shaft; 6. a motor housing; 7. a motor rotor; 8. a motor stator; 9. a confluence disc; 10. a controller; 11. a one-way valve; 11.1, steel balls; 11.2, a spring; 11.3, valve seats; 12. an oil pump seal ring; 13. a motor sealing ring; 14. a controller seal ring; 15. a controller cover; 15.1, cover screws; 16. a waterproof vent valve; 17. a wire harness; 17.1, harness screws; 18.1, a first supporting slide bearing; 18.2, second support slide bearing.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The electronic oil pump can be applied to an automobile lubricating system and/or a cooling system, can provide flowing circulating power for a working medium in the automobile lubricating system and/or the cooling system, and can provide lubricating oil and/or cooling oil for a transmission system.

As shown in fig. 1 and 2, there is shown an electronic oil pump including a pump body 1, a pump cover 2, an inner rotor 3, an outer rotor 4, a drive shaft 5, a motor housing 6, a motor rotor 7, a motor stator 8, a confluence plate 9, and a controller 10; the pump body 1 can form a cavity, the inner rotor 3 and the outer rotor 4 are arranged in the cavity of the pump body 1, similarly, the motor shell 6 can form a cavity, the motor rotor 7 and the motor stator 8 are arranged in the motor shell 6, the motor rotor 7 and the inner rotor 3 are separated by the pump cover 2 and are connected together by the driving shaft 5 in an interference manner; the controller 10 is installed on the motor shell 6, and the controller 10 is connected with the motor stator 8 through the confluence disc 9. The controller 10 is connected to an external system by a wire harness 17. When the electronic oil pump works, an external system transmits a control signal to the controller 10 through the wire harness 17, the controller 10 controls the motor stator 8 to generate a regularly changing magnetic field through the confluence disc 9, the motor rotor 7 rotates under the action of an alternating magnetic field and drives the oil pump to rotate through the driving shaft 5, and then oil is conveyed out, so that the cooling and lubricating functions are realized.

In the invention, as shown in fig. 2, a motor rotor 7 and an inner rotor 3 are separated by a pump cover 2, and the pump cover 2 and a pump body 1 are assembled to form a sealed oil pump cavity 1.1. The electronic oil pump adopts the modularized design, when the oil pump or the electronic oil pump mounting hole that carry on different discharge capacities are different, only need to change the pump body 1, the pump cover 2, inner rotor 3 and outer rotor 4 can, because the oil feed chamber 1.2 of design on the pump cover 2, play oil chamber 1.3 and inner rotor 3, the 4 size matchings of outer rotor, relative oil pump oil pocket design is on motor casing 6 or pump cover 2 and the integrated product of motor casing 6, can avoid changing the great motor casing 6 of volumetric structure, it is convenient to change. The platform degree is high, simple structure, and the development risk is low, and the cost is lower.

As shown in fig. 3 and 4, the inner rotor 3 and the outer rotor 4 are installed in the pump cavity 1.1 of the pump body 1, the axial leads of the inner rotor 3 and the outer rotor 4 have an eccentricity, the teeth of the inner rotor 3 and the outer rotor 4 are meshed with each other, the teeth number differs by one tooth, the inner rotor 3, the outer rotor 4 and the pump bodies 1 and the pump covers 2 on two sides form a sealing cavity, and the meshing line of the inner rotor 3 and the outer rotor 4 divides the sealing cavity into an oil inlet cavity 1.2 and an oil outlet cavity 1.3. When the motor rotates, the inner rotor 3 is driven to rotate clockwise, the outer rotor 4 is further driven to rotate at the same direction and different speeds, the volume of the oil inlet cavity 1.2 is gradually increased to form partial vacuum, engine oil is sucked into the pump cavity 1.1, the volume of the oil outlet cavity 1.3 is gradually reduced, the pressure in the cavity is gradually increased, and the oil is pressed out of the oil pump, so that the structure is simple and reliable.

As shown in fig. 2, a motor rotor 7 is installed at one end of a driving shaft 5, and an oil pump inner rotor 3 is installed at the other end of the driving shaft. The invention is redesigned, two sliding bearings are arranged on two sides of the inner rotor 3 and are respectively positioned on the pump body 1 and the pump cover 2, the pump body 1 is provided with a pump body shaft hole 1.4, the pump cover 2 is provided with a pump cover shaft hole 2.1, one end of the driving shaft 5 is arranged in the pump body shaft hole 1.4 to form a first supporting sliding bearing 18.1, and a section of the driving shaft 5 between the inner rotor 3 and the motor rotor 7 and the pump cover shaft hole 2.1 form a second supporting sliding bearing 18.2.

Specifically, as shown in fig. 5 and fig. 6, a pump body lubrication groove 1.5 is provided in the pump body shaft hole 1.4, when the oil pump rotates to output oil with a certain pressure, part of the oil enters the pump body lubrication groove 1.5 on the pump body shaft hole 1.4 through the end face gap between the inner rotor 3 and the pump body 1, lubricate the driving shaft 5 when the driving shaft 5 rotates at a high speed, wear is avoided, a pump body oil drainage pipeline 1.6 is provided at the bottom of the pump body shaft hole 1.4, the oil entering the pump body lubrication groove 1.5 can flow into the oil inlet cavity 1.2 through the pump body oil drainage pipeline 1.6 after lubricating the driving shaft 5, continuous circulation of the lubrication oil is realized, reduction of lubrication effect of the driving shaft 5, large torque, performance reduction, or abnormal wear of the driving shaft 5 and the shaft hole is caused due to the fact that the oil is sealed in the pump body shaft hole 1..

Similarly, as shown in fig. 7 and 8, be provided with pump cover lubrication groove 2.4 in pump cover shaft hole 2.1, be used for lubricated drive shaft 5, between the slide bearing of second support section and motor rotor 7, pump cover shaft hole 2.1 terminal oil blanket 2.2 department is provided with oil blanket 2.3, play the sealing action, prevent that fluid from entering into inside the motor through pump cover shaft hole 2.1, be provided with a pump cover draining pipeline 2.5 between the slide bearing of oil blanket 2.3 and second support section equally, flow into oil feed chamber 1.2 through pump cover draining pipeline 2.5 behind the lubricated drive shaft 5 of fluid, realize the continuous lubrication of drive shaft 5, avoid simultaneously that the inside higher pressure that forms of oil blanket 2.3 leads to fluid to reveal in motor casing 6. The invention has simple and reliable structure, low cost and convenient assembly.

As shown in fig. 4, the outlet of the oil pump is provided with a check valve 11, the check valve 11 comprises a steel ball 11.1, a spring 11.2 and a valve seat 11.3, the bottom of the valve seat 11.3 is provided with three fan-shaped windows, the middle part of the valve seat is provided with a positioning boss with the diameter of 1.2mm, the spring 11.2 is prevented from being installed and inclined, when the oil pump rotates to discharge oil, the steel ball 11.1 can be pushed to compress the spring 11.2 under the condition that the oil pressure is very small, oil discharge is realized, when the oil pump stops rotating, the spring 11.2 can push the steel ball 11.1 to reset, the outlet is sealed, and. The valve seat 11.3 is a stamping part and is in interference fit with the pump body 1, and the structure is simple.

In addition, the electronic oil pump also comprises an oil pump sealing ring 12, a motor sealing ring 13 and a controller sealing ring 14, so that a better waterproof effect is achieved, and the normal operation of the oil pump is ensured. The controller cover 15 is provided with a waterproof vent valve 16 for preventing liquid such as water from entering and ensuring gas circulation to balance the internal and external pressures of the electronic oil pump.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.

Claims

1. An electronic oil pump, characterized in that: the pump comprises a pump body (1), a pump cover (2), an inner rotor (3), an outer rotor (4), a driving shaft (5), a motor shell (6), a motor rotor (7), a motor stator (8), a confluence disc (9) and a controller (10), wherein the inner rotor (3) and the outer rotor (4) are arranged in a cavity of the pump body (1), the motor rotor (7) and the motor stator (8) are arranged in the motor shell (6), and the motor rotor (7) and the inner rotor (3) are separated by the pump cover (2) and are connected by the driving shaft (5); the controller (10) is installed on the motor shell (6), and the controller (10) is connected with the motor stator (8) through the confluence disc (9); a pump body shaft hole (1.4) is formed in the pump body (1), a pump body lubricating oil groove (1.5) is formed in the pump body shaft hole (1.4), and a pump body oil drainage pipeline (1.6) is arranged at the bottom of the pump body shaft hole (1.4); be equipped with pump cover shaft hole (2.1) on pump cover (2), be provided with pump cover lubrication groove (2.4) in pump cover shaft hole (2.1) the bottom in pump cover shaft hole (2.1) is provided with a pump cover draining pipeline (2.5).

2. The electronic oil pump of claim 1, wherein: one end of the driving shaft (5) is arranged in a pump body shaft hole (1.4) of the pump body (1) to form a first supporting sliding bearing (18.1).

3. The electronic oil pump according to claim 2, characterized in that: and a section of driving shaft (5) between the inner rotor (3) and the motor rotor (7) and the pump cover shaft hole (2.1) form a second supporting sliding bearing (18.2).

4. The electronic oil pump of claim 1, wherein: inner rotor (3) and outer rotor (4) intermeshing, inner rotor (3), outer rotor (4) and the pump body (1) pump cover (2) of both sides form seal chamber, seal chamber is divided into oil feed chamber (1.2) and oil outlet chamber (1.3) with the mating line of inner rotor (3), outer rotor (4).

5. The electronic oil pump of claim 1, wherein: the tail end of the pump cover shaft hole (1.4) is provided with an oil seal hole (2.2), and the oil seal hole (2.2) is provided with an oil seal (2.3).

6. The electronic oil pump of claim 1, wherein: the outlet of the electronic oil pump is provided with a one-way valve (11), the one-way valve (11) comprises a steel ball (11.1), a spring (11.2) and a valve seat (11.3), the valve seat is matched with the pump body (1), and the steel ball and the spring are arranged in the valve seat.

7. The electronic oil pump of claim 6, wherein: the bottom of the valve seat is provided with a fan-shaped window, and the middle of the valve seat is provided with a positioning boss.

8. The electronic oil pump of claim 1, wherein: the electronic oil pump further comprises an oil pump sealing ring (12), a motor sealing ring (13) and a controller sealing ring (14).

9. The electronic oil pump of claim 1, wherein: a controller cover (15) is arranged outside the controller, and a waterproof vent valve (16) is arranged on the controller cover (15).

10. The electronic oil pump of claim 1, wherein: the controller (10) is connected with an external system through a wiring harness (17).